{"id":75116,"date":"2020-04-21T12:46:37","date_gmt":"2020-04-21T11:46:37","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=75116"},"modified":"2020-04-21T12:46:37","modified_gmt":"2020-04-21T11:46:37","slug":"breathable-membrane","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/planning-construction-news\/breathable-membrane\/75116\/","title":{"rendered":"Keeping your building envelope safe during COVID-19"},"content":{"rendered":"

Breathable Membranes can keep your building envelope safe whilst you keep safe in these challenging times, says A Proctor Group<\/a><\/h2>\n

BS 5534 and BS 5250 address breathable membrane requirements but do not take into account construction sites which have closed for over three months due to COVID-19<\/a> lockdown.<\/p>\n

How to keep your building envelope safe<\/h3>\n

Whilst most membranes are weather-resistant for three months, the best advice is to cover as quickly as possible with the primary water-shedding layer. This is an accurate action to take, as extreme cases of weather water ingress<\/a> may occur. What happens when external factors mean that this advice cannot be followed, and roofing or walling membranes are left exposed over the suggested maximum period? Does it mean the membrane has to be stripped and replaced before the outer layer covering is installed?<\/p>\n

The three main characteristics which are important to the long-term protection and performance of the roof or wall are MVTR (Vapour Permeability), water holdout and airtightness.<\/p>\n

Proctor Group\u2019s<\/a> breathable membranes have been tested quarterly for 12 months during 2019, with all of the above factors tested periodically. The results showed the membranes main attributes are robust enough to maintain performance in all categories, preventing the expense of stripping and replacing when sites open again.<\/p>\n

Proctor Group said: \u201cWe are confident of their long-term durability and robustness, and the results proved interesting, especially in the current climate, where a lack of finished roof covering or rainscreen fa\u00e7ade may leave these membranes exposed for longer periods.\u201d<\/p>\n

Roofshield roof tile underlay was tested after nine months exposure, and still passed the European water hold of a W1, to EN 13859 Part 1. It maintained its vapour permeability consistently over a 12-month period.<\/p>\n

Wraptite, a fully self-adhered, airtight, vapour permeable underlay for walls and roofs maintained its vapour permeability and airtightness throughout the year. Its water hold-out for walls of W2 also remained for 12 months, which was tested to EN 13859 and W1 for over 6 months.<\/p>\n

Rise to the challenge of protecting structures<\/h3>\n

Roofshield and Wraptite show their pedigree, durability and they rise to the challenge of protecting structures in times of site delays. They both maintain the key characteristics for the life of the building when the final covering is applied when sites reopen<\/a> across the country.<\/p>\n

While all appreciate that breathable membranes are designed for temporary protection and good practice is always that the outer covering is installed as soon as possible, it is comforting to know the building is kept safe while you keep safe.<\/p>\n

\n<\/div>","protected":false},"excerpt":{"rendered":"

Breathable Membranes can keep your building envelope safe whilst you keep safe in these challenging times, says A Proctor Group.<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[304],"tags":[594,277,676,54592,22592,740],"stakeholder_rel_tag":[172361],"contributor_rel_tag":[],"class_list":{"0":"post-75116","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-planning-construction-news","7":"tag-building-design","8":"tag-built-environment","9":"tag-construction","10":"tag-coronavirus","11":"tag-sh-a-proctor-group","12":"tag-structural-waterproofing","13":"stakeholder_rel_tag-a-proctor-group"},"acf":[],"yoast_head":"\nKeeping your building 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